No, it actually doesn't.

https://www.tsa.gov/coronavirus/passenger-throughput

Look at the actual numbers of actual passengers.

9/26-10/2: 5,245,915 weekly pax...749,416 daily average
9/19-9/25: 5,067,589 weekly pax...723,942 daily average
9/12-9/18: 4,850,301 weekly pax...692,900 daily average


4.48% week-over-week passenger growth in the seven day period beginning 9/19, followed by 3.52% week-over-week passenger growth in the seven day period beginning 9/26.

If this is too much of 'the math' for you, look at Tuesday, which are always the lowest travel day, in the month of September:

29 Sept: 568,668
22 Sept: 549,741
15 Sept: 522,383
8 Sept: 704,075 (Labor Day Holiday bump)
1 Sept: 516,068

Year-over-year figure was 25.3% on September 1st (Tuesday), that figure was 30.4% on September 30th (Wednesday).

If you consider 5.1% increase in year-over-year load factors from the beginning to end of September a plateau, I suppose that's your perogative.